Changes in fatty acids and glycero lipids of tobacco nicotiana tabacum cultivar burley 21 leaves during air curing

Matsuzaki, T.; Koiwai, A.; Kawashima, N.; Matsuyama, S.

Agricultural and Biological Chemistry 45(10): 2317-2322


ISSN/ISBN: 0002-1369
Accession: 004907814

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Changes in the lipid components of tobacco leaves during air-curing were investigated. In the air-curing system the contents of total fatty acids and linolenic acid decreased markedly. Digalactosyldiglyceride, monogalactosyldiglyceride, sulfoquinovosyldiglyceride and phosphatidylglycerol, which are components of chloroplast membranes, were degraded almost completely during the process. Phosphatidylethanolamine, phosphatidylserine, phosphatidylcholine (PC) and phosphatidylinositol (PI) were relatively resistant to the degradation process during the yellowing stage but they also decreased markedly thereafter. PC and PI remained until the final drying stage, although their contents were low. In most polar lipids, a considerable decrease was observed in the ratio of linolenic acid. Free fatty acid content increased gradually.